ML20246P480

Advises of Locations & Features That Geologists Need to Inspect for Completion of Review of Sept 1987 Response to NRC Questions on Geologic & Seismologic Conditions

ML20246P480
Person / Time
Site:	Rancho Seco
Issue date:	05/10/1989
From:	Kalman G Office of Nuclear Reactor Regulation
To:	Firlit J SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
TAC-13099, NUDOCS 8905220203
Download: ML20246P480 (4)

Text

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.. [ g NUCLEAR REGULATORY COMMISSION l

WASHINGTON, D. C. 20555

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_ ***** f. May 10, 1989 Docket No.: 50-312.

Mr. Joe Firlit Chief Executive Of ficer, Nuclear Rancho Seco Nuclear Generating Station 14440 Twin Cities Road Herald, California 95638-9799

SUBJECT:

SEISMICANDGE0LOGICALREVIEW(TACNO.13099)

'As part of its seismic and geologic review program for the Rancho Seco Nuclear Generating Station the Nuclear Regulatory Commission (NRC) staff is reviewing the Sacramento Municipal Utility District (SMUD) September 1987 report Response To NRC Ouestions On Geologic and Seismologic Conditions. In order for the stati to satisf actorily con.plete its review, it is necessary for an NRC geologist to make a field trip to inspect some of the geolcgic features dis-cussed in the September 1987 report. Among the locations and features that the geologist needs to inspect are the following:

1. North Jackson Valley Lineament.

a. The fault in the greenstone qtarry, shown in figure 5.3-1, and its cross cutting relationship with the Valley Springs Formation.

b. The logs, geologic maps, and photographs of the two trenches, stock pond bank, and the outcrops at the base of the hills A and B, which were not included in the report.

c. The outcrops on hills A and B, section 5.3 of report, that .

cross the lineament, shown in figure 5.3-1.

d. The exposure along the side of the stock pond, shown in figure 5.3-1, that lies along the lineament.

e. Any representative outcrops that support the SMUD conclusion that the lineament is not fault controlled.

2. China Gulch Fault,

a. The local outcrops of Tertiary and Mesozoic stratigraphy, particularly the Ione formation, so that a comparison can be made with the photographs.

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b. The' exposures of the-China Gulch Fault such as natural ones along the Mokelumne River and in road cuts such as on the Comanche Parkway North and China Gulch Road.

c. The continuous outcrop along Coal Mine Road which constrains t

the northern extension of the China Gulch Fault.

.d. The airphotos used to disassociate the fault from lineaments.

e. The relationship between the trench locations and the trace of the China Gulch Fault zone.

f. Confirmation of the adequacy of the Electron Spin Resonance nethod as used in the SMUD evaluation.

3. The slide feature in the Ione Clay Pit described in section 6.7 of the report.

4. A representative example of the Late Quaternary faulting within the Foothills Fault System, such as the Poorn.an Gulch fault.

SMUD should provide a geologist who is familiar with the report, the investi-gations that were performed in preparing the report, and the geology of the area to accompany and guide the NRC geologist.

Per discussions with Mr. J. Delezinski of your staff, we have proposed a tentative date, June 19 and 20, 1989, for the field trip and meeting with your geologist. Please advise whether you can accommodate our request.

Sincerely,

/s/

George Kalman, Project Manager Project Directorate V Division of Reactor Projects - III, IV, Y and Special Projects cc: See next page DISTRIBUTION 2 SReynolds

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b. The exposures of the China Gulch Fault such as natural ones along the Mokelumne River and in road cuts such as on the Commanche Parkway North and China Gulch Road.

c. The continuous outcrop along Coal Mine Road which constrains the northern extension of the China Gulch Fault.

d. The airphotos used to disassociate the fault from lineaments.

e. The relationship between the trench locations and the trace of the China Gulch Fault zone.

f. Confirmation of the adequacy of the Electron Spin Resonance method as used in the SMUD evaluation.

3. The slide feature in the Ione Clay Pit described in section 6.7 of the report.

4. A representative example of the Late Quaternary faulting within the Foothills Fault System, such as the Poorman Gulch fault.

SMUD should provide a geologist who is familiar with the report, the investi-gations that were performed in preparing the report, and the geology of the area to accompany and guide the NRC geologist.

Per discussions with Mr. J. Delezinski of your staff, we have proposed a tentative date, June 19 and 20, 1989, for the field trip and meeting with your geologist. Please advise whether you can accomodate our request.

Sincerely,

, h xm. f ( Ar1 W George Kalman, Project Manager Project Directorate V Division of Reactor Projects - III, IV, V and Special Projects cc: See next page I

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,1 ' Mr. Joe Firlit Rancho Seco Nuclear Generating Station cc:

Mr. David S. Kaplan, Secretary ' Mr. JoM Bartus and General Counsel Ms. JoAnne Scott Sacramento Municipal Utility District Federal Energy Regulatory Commission 6201 S Stre.et 825 North Capitol Street, N. E.

P.O. Box 15830 .. Washington, D.C. 20425 Sacramento, California 95813

-Thomas'A. Baxter, Esq. Ms. Helen Hubbard Shaw, Pittman, Potts & Trowbridge P. O. Box 63 2300 N Street, N.W. Sunol, California 94586 Washington, D.C. 20037l

' Mr. Steven Crunk ,

Manager, Nuclear Licensing Sacramento Municipal Utility Dist.rict Rancho Seco Nuclear Generating Station 14440 Twin Cities Road Herald,-California. 95638-9799 Mr. Robert B. Borsum, Licensing Representative >

' Babcock & Wilcox Nuclehr Power Division 1700 Rockville. Pike ' Suite 325

' Roe;;ville, Maryland 20852 Resident Inspector / Rancho Seco c/o U. S, N. R. C.

14440 Twin Cities Road

-Herald, California 95638 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Paul Szalinski, Chief l

Radiological Health Branch State Department of Health Services 714 P Street, Office Building #8 v Sacramento, California 95814 Sacramento County 1 Board of Supervisors 700 H Street, Suite 2450 Sacramento, California 95814 l:

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